Razorline: OBD GPS Lap Timer

Razorline is a GPS lap timer and car telemetry app built for drivers who want to understand every lap, route and corner with clear, motorsport-style data.

Create or record routes, set start lines and sectors, compare lap times, follow your ghost lap on the map and review your driving with detailed session history. Whether you are preparing for a track day, testing a private route or analyzing a legal drive, Razorline gives you a focused performance dashboard without unnecessary clutter.

Key features:

• GPS lap timer with start/finish lines and sector timing
• Ghost lap on the map to compare your current run with your best reference
• Live delta, best lap and theoretical best sector calculation
• Custom driving HUD with speed, RPM, throttle, G-force, lap time and route data
• OBD-II telemetry support with compatible ELM327 Bluetooth adapters
• Route builder with saved routes, GPX import and route recording
• Challenge mode to share a lap ghost and compete on the same route
• Session history with lap times, sector times, speed trace and telemetry charts
• Vehicle profiles to compare results between different cars
• CSV and GPX export for deeper analysis
• Music controls integrated into the HUD

Razorline is designed for closed circuits, track days, private roads and controlled driving environments. Route and telemetry tools can also help you review everyday drives where permitted, but always follow local traffic laws and never interact with your phone while driving.

If you care about lap timing, GPS telemetry, OBD data, ghost laps, route analysis and a clean racing-style dashboard, Razorline brings them together in one app.